export type TerminalSnapshot = {
    app: string;
    tab: string;
    content: string;
    windowTitle: string;
};
export type TerminalDiff = {
    added: TerminalSnapshot[];
    removed: TerminalSnapshot[];
    changed: {
        app: string;
        tab: string;
        windowTitle: string;
        newLines: string;
    }[];
};
/**
 * Capture the exact text content of all open terminal tabs on macOS.
 * Supports iTerm2 and Terminal.app. Returns an empty array on non-macOS
 * platforms or if neither terminal app is running.
 */
export declare function captureTerminals(): Promise<TerminalSnapshot[]>;
/**
 * Compute the diff between two successive snapshots.
 *
 * - `added`: tabs present in `current` but not in `previous`
 * - `removed`: tabs present in `previous` but not in `current`
 * - `changed`: tabs present in both where content grew — only the newly
 *   appended lines are returned. Tabs whose content shrank or was fully
 *   replaced are treated as changed with the full new content as `newLines`.
 */
export declare function captureTerminalDiffs(previous: TerminalSnapshot[], current: TerminalSnapshot[]): TerminalDiff;